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Java has 2 types of constructors based on parameters passed:
- Default or parameter-less constructor: A constructor which does not accept any arguments.
- Parametrized constructor: A constructor which accepts one or more arguments.
Similarly based on Access modifier also we have:
- Public constructor - Class can be instantiated by anyone
- Private constructor - Class cannot be instantiated by anyone
- Protected constructor - Class can be instantiated only by sub classes
What else can I help you with?
Does Java support copy constructor?
No. Java does not support copy constructor
What is a constructor and its mandatory to use constructor in a class?
A constructor is a method that is invoked when an object is created. As to being mandatory, that really depends on the programming language; in the case of Java, each class must have a constructor, however, in many cases Java will automatically provide a default constructor, so you don't really need to program it.
Can you initialize an object without constructor in java?
No. if you wish to create an object that you plan on using in a java program then the answer is NO. You cannot initialize an object of a Java class without calling the constructor.
Can a constructor be defined within a method in java?
No.
What does it mean in java when a constructor is undefined?
When a constructor is not define in java then the instance used in class is not optimised the value and therefore some times it generates some garbage value. By the way , When we not define a constructor then generally it not distrub the execution of the program.
Does Java support copy constructor?
No. Java does not support copy constructor
What happens when no constructor function is declared in a class - in Java?
When any constructor is deffined in your class, the java compiler create a default no argument constructor for you. This constructor only have an invocation to the super class constructor (" super( ) ").
How many constructor can be defined in a classin java p rogramming?
how many constructer can be defined in class in overloading of java programming
Is there a sample program for constructor?
All Java programs would have a constructor... public class Test { public Test(){ ... } ..... } This is a constructor. Even if you dont code the constructor Java would automatically place a default constructor for compilation.
What is a constructor and its mandatory to use constructor in a class?
A constructor is a method that is invoked when an object is created. As to being mandatory, that really depends on the programming language; in the case of Java, each class must have a constructor, however, in many cases Java will automatically provide a default constructor, so you don't really need to program it.
What is use of constructor in java?
Constructor is used to do something (written in constructor) immediately after object creation.
Can you initialize an object without constructor in java?
No. if you wish to create an object that you plan on using in a java program then the answer is NO. You cannot initialize an object of a Java class without calling the constructor.
Can a constructor be defined within a method in java?
No.
What is copy constructor in java?
Java, unlike C++ does not support copy constructors.
Can you create a constructor for an interface in java?
NO, we cannot create a contructor for an interface in java.
Why constructor rather than classes in java?
Constructor is not an alternative to class. In Java, you create classes; the classes contain methods - including the constructor, which can be viewed as a special method. If you want to have a constructor, you need a class that surrounds it, so it's not one or the other.
Why constructor use in java?
To create objects of classes
